pdfdroppw.sh - Drop password from PDF file.

pdfdroppw.sh

#!/usr/bin/env bash

function usage ()
{
  cat <<-EOD
	Usage: ${0##*/} [options] <pdffile>...
	  Drop password from PDF file.
	Output:
	  \${@%.*}_nopw.pdf
	Environment variables:
	  \$OPT_PASSWORD : password
	Options:
	  -p, --password <password>
	EOD
}

function pdfdroppw () # <pdffile>...
{
  local i
  for i; do
    qpdf --password="${OPT_PASSWORD}" --decrypt "$1" "${1%.*}_nopw.pdf"
  done
}

args=()
while (( 0 < $# )); do
  case "$1" in
    -p|--password)
      OPT_PASSWORD="$2"
      shift 2
      ;;
    -*)
      echo "Error: unknown option: $1"
      exit 1
      ;;
    *)
      args+=( "$1" )
      shift
      ;;
  esac
done
set -- "${args[@]}"

if (( $# <= 0 )); then
  usage
  exit
fi

pdfdroppw "$@"